Interactive graphic input system
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United States of America Patent
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Feb 7, 1995
Issued Date -
N/A
app pub date -
Feb 24, 1993
filing date -
Apr 25, 1986
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In the conventional CAD or CAM system, when a shape must be defined, it should use mathematical models which are formed by B-Reps or CSG method. B-Reps method is more complicated than CSG in data structure and in processing. This invention attempts to utilize merits of the CSG method, express component elements of a three-dimensional solid model in a hierarchical structure so that an element of a a higher order can relocate another element of a lower order on its coordinate system, and an interactive operation can be employed in defining. This method allows an operator to ascertain the progress of the works with his/her own eyes to greatly simplify the works of shape defining of solid models.
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Cited Art Landscape
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